"We are also closely monitoring the situation, and will
make changes to our current policy if necessary," American told
Business Insider in an email.

Delta Air Lines:

In response to the Zika outbreak, Delta issued the
following travel advisory:

Customers with current reservations who are concerned
about traveling to destinations reported by the CDC to be
affected by Zika Viral Illness should call 1-800-221-1212 (U.S.)
or your local Reservations office and speak with a Delta
Representative.

Customers may qualify for a change to alternate
destinations, travel dates or a refund. Customers may make
fee-waived changes to future reservations/tickets. However,
changes need to be made by February 29, 2016.

United Airlines:

United Airlines has not issued an advisory for the affected
areas, but the airline will offer refunds to customers who are
pregnant, who no longer wish to travel.

Pregnant women with tickets to affected areas can receive
refunds," A United spokesperson told Business Insider via email.
"Rather than issuing an advisory, we ask customers to reach out
to us directly."

Air France:

In response to the outbreak, Air France has issued to
following statement to Business Insider:

Air France confirms that the Zika virus has had no
impact on its flight operations and service to the destinations
concerned. The Company continues to closely monitor the
situation, and is in direct contact with the French and
international health authorities (French Health Ministry, WHO,
CDC, ECDC, IATA, etc.).

Announcements are made on board flights to the regions
affected by the virus to inform customers about the precautionary
measures to observe. Flight crews have also
been informed about these same measures.

British Airways:

"If a pregnant customer is due to travel up to and
including February 29, but they no longer wish to travel,"
British Airways said in an email to Business Insider. "They can
change their booking free of charge and delay their journey or
amend to an alternative destination."

"This applies to flights to Brazil, Mexico, Barbados and
Dominican Republic, and we will continue to review the
situation."